ACST8 Datasheet by STMicroelectronics

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This is information on a product in full production.
September 2017 DocID7463 Rev 10 1/17
ACST8
Overvoltage protected AC switch
Datasheet
-
production data
Figure 1.
Functional diagram
Features
Triac with overvoltage protection
High noise immunity: static dV/dt > 2000 V/µs
TO-220FPAB insulated package:
complies with UL standards
(file ref: E81734)
insulation voltage: 2000 V
RMS
Benefits
Enables equipment to meet IEC 61000-4-5
High off-state reliability with planar technology
Needs no external overvoltage protection
Reduces the power passive component count
High immunity against fast transients
described in IEC 61000-4-4 standards
Applications
AC mains static switching in appliance and
industrial control systems
Drive of medium power AC loads such as:
Universal motor of washing machine drum
Compressor for fridge or air conditioner
Description
The ACST8 series belongs to the ACS/ACST
power switch family built around A.S.D.
(application specific discrete) technology. This
high performance device is suited to home
appliances or industrial systems and drives an
induction motor up to 8 A.
This ACST8 device embeds a Triac structure with
a high voltage clamping device to absorb the
inductive turn off energy and withstand line
transients such as those described in the
IEC 61000-4-5 standards.
ACST8 shows a high noise immunity complying
with IEC standards such as IEC 61000-4-4 (fast
transient burst test).
TO-220AB
ACST830-8T TO-220FPAB
ACST830-8FP
D
2
PAK
ACST830-8G
COM
OUT
OUT
G
COMOUT
G
G
OUT
COM
G
COM
OUT
Table 1. Device summary
Symbol Value Unit
I
T(RMS)
8A
V
DRM
/V
RRM
800 V
I
GT
30 mA
www.st.com
Characteristics ACST8
2/17 DocID7463 Rev 10
1 Characteristics
Table 2. Absolute ratings (limiting values)
Symbol Parameter Value Unit
I
T(RMS)
On-state rms current (full sine wave)
TO-220FPAB T
case
= 91 °C
8A
TO-220AB /
D
2
PAK T
case
= 105 °C
D
2
PAK with
1cm2 Cu T
amb
= 43 °C 2 A
I
TSM
Non repetitive surge peak on-state current
T
j
initial = 25 °C, full cycle sine wave
F = 50 Hz t
p
= 20 ms 80 A
F = 60 Hz t
p
= 16.7 ms 84 A
I
2
t Thermal constraint for fuse selection t
p
= 10 ms 42 A
2
s
dI/dt Critical rate of rise on-state current
I
G
= 2 x I
GT,
(t
r
100 ns) F = 120 Hz T
j
= 125 °C 100 A/µs
V
PP
(1)
Non repetitive line peak pulse voltage T
j
= 25 °C 2 kV
P
G(AV)
Average gate power dissipation T
j
= 125 °C 0.1 W
P
GM
Peak gate power dissipation (t
p
= 20 ms) T
j
= 125 °C 10 W
I
GM
Peak gate current (t
p
= 20 ms) T
j
= 125 °C 1.6 A
T
stg
Storage temperature range - 40 to + 150 °C
T
j
Operating junction temperature range - 40 to + 125 °C
T
l
Maximum lead soldering temperature during 10 s 260 °C
V
INS(RMS)
Insulation RMS voltage (60 seconds) TO-220FPAB 2000 V
1. According to test described in IEC 61000-4-5 standard and Figure 17.
Table 3. Electrical characteristics per switch
Symbol Test conditions
Quadrant
T
j
Value Unit
I
GT(1)
V
OUT
= 12 V, R
L
= 33 ΩI - II - III 25 °C Max 30 mA
V
GT
V
OUT
= 12V, R
L
= 33 ΩI - II - III 25 °C Max 1.0 V
V
GD
V
OUT
= V
DRM
,
R
L
= 3.3 kΩI - II - III 125 °C Min 0.2 V
I
H(2)
I
OUT
= 500 mA 25 °C Max 30 mA
I
L
I
G
= 1.2 x I
GT
I - II - III 25 °C Max 50 mA
dV/dt
(2)
V
OUT
= 67% V
DRM
, gate open 125 °C Min 2000 V/µs
(dI/dt)c
(2)
Without snubber 125 °C Min 8 A/ms
V
CL
I
CL
= 0.1 mA, t
p
= 1 ms 25 °C Min 850 V
1. Minimum I
GT
is guaranteed at 5% of I
GT(Max)
2. For either positive or negative polarity of OUT pin with reference to COM pin
15 5a 75 um as
DocID7463 Rev 10 3/17
ACST8 Characteristics
17
Table 4. Static characteristics
Symbol Test conditions Value Unit
V
TM
I
TM
= 11.3 A t
p
= 500 µs Tj = 25 °C Max 1.5 V
V
TO
Threshold voltage Tj = 125 °C Max 0.9 V
R
D
Dynamic resistance Tj = 125 °C Max 50 mΩ
I
DRM
I
RRM
V
OUT
= V
DRM
/ V
RRM
Tj = 25 °C Max 20 µA
Tj = 125 °C 1 mA
Table 5. Thermal resistances
Symbol Parameter Value Unit
R
th(j-a)
Junction to ambient TO-220FPAB
TO-220AB 60
°C/W
Junction to ambient (soldered on 1 cm
2
copper pad) D
2
PAK 45
R
th(j-c)
Junction to case (AC) TO-220FPAB 3.6
TO-220AB, D
2
PAK 2
Figure 2. Maximum power dissipation versus
on-state RMS current Figure 3. On-state RMS current versus case
temperature (full cycle)
P(W)
0
1
2
3
4
5
6
7
8
9
10
012345678
α=180 °
180°
I (A)
T(RMS)
I (A)
T(RMS)
0
1
2
3
4
5
6
7
8
9
0 25 50 75 100 125
α=180°
TO-220FPAB
220AB
D
2
PA C K
TO-
T (°C)
C
25 m an :5 75 5-7 75 mo mn um 115 «:5 man man an um .15 I mm: mm a 25 um I nionn 5n ‘ nun 75 100 mm: mu ‘ am: 115 men
Characteristics ACST8
4/17 DocID7463 Rev 10
Figure 4. On-state RMS current versus ambient
temperature
(free air convection, fulle cycle)
Figure 5. Relative variation of thermal
impedance versus pulse duration
I (A)
T(RMS)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 25 50 75 100 125
α=180°
TO-220
D
2
PA K
Copper surface
= 1cm
2
T (°C)
amb
Figure 6. Relative variation of gate trigger
current (I
GT
) and voltage (V
GT
) versus junction
temperature
Figure 7. Relative variation of holding current
(I
H
) and latching current (I
L
) versus junction
temperature
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-50 -25 0 25 50 75 100 125
I
GT
,V
GT
[T
j
]/I
GT
,V
GT
[T
j
=25 °C]
IGT Q1-Q2
VGT Q1-Q2-Q3
IGT Q3
Tj(°C)
Typical values
0.0
0.5
1.0
1.5
2.0
2.5
-50 -25 0 25 50 75 100 125
I
H
,I
L
[T
j
]/I
H
,I
L
[T
j
=25 °C]
I
H
I
L
T
j
(°C)
Figure 8. Surge peak on-state current versus
number of cycles Figure 9. Non repetitive surge peak on-state
current versus sinusoidal pulse width
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DocID7463 Rev 10 5/17
ACST8 Characteristics
17
Figure 10. On-state characteristics
(maximum values) Figure 11. Relative variation of critical rate of
decrease of main current (dI/dt)
c
versus junction
temperature
(dI/dt)c[T ] /
j(dI/dt)c[T =125°C]
j
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
25 50 75 100 125
Tj(°C)
Figure 12. Relative variation of static dV/dt
immunity versus junction temperature (gate
open)
Figure 13. Relative variation of leakage current
versus junction temperature
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I
DRM
/I
RRM
[Tj;V
DRM/
V
RRM
]/I
DRM
/I
RRM
[Tj=125°C;
8
00V]
1.0E-03
1.0E-02
1.0E-01
1.0E+00
25 50 75 100 125
V
DRM
=V
RRM
=800 VV
DRM
=V
RRM
=800 V
V
DRM
=V
RRM
=600 V
V
DRM
=V
RRM
=200 V
T
j
(°C)
Different blocking voltages
Figure 14. Relative variation of clamping
voltage (V
CL
) versus junction temperature
(minimum values)
Figure 15. Thermal resistance junction to
ambient versus copper surface under tab
V
CL
[Tjj/V
CL
[Tj=25°C]
0.85
0.90
0.95
1.00
1.05
1.10
1.15
-50 -25 0 25 50 75 100 125
T
j
(°C)
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Application information ACST8
6/17 DocID7463 Rev 10
2 Application information
2.1 Typical application description
The ACST8 device has been designed to control medium power load, such as AC motors in
home appliances. Thanks to its thermal and turn off commutation performances, the ACST8
switch is able to drive an inductive load up to 8 A with no turn off additional snubber. It also
provides high thermal performances in static and transient modes such as high torque
operating conditions or inrush current of an AC motor.
Figure 16. AC induction motor control – typical diagram
Selection of the
rotor direction
AC
induction
motor
Phase shift capacitor +
protective air inductance
ACST
MCU
AC Motor
Rg
C
AC Mains
Vcc
Rg
ACST
L
£2
DocID7463 Rev 10 7/17
ACST8 Application information
17
2.2 AC line transient voltage ruggedness
In comparison with standard Triacs, which are not robust against surge voltage, the ACST8
is self-protected against over-voltage, specified by the new parameter V
CL
. The ACST8
switch can safely withstand AC line transient voltages either by clamping the low energy
spikes, such as inductive spikes at switch off, or by switching to the on state (for less than
10 ms) to dissipate higher energy shocks through the load. This safety feature works even
with high turn-on current ramp up.
The test circuit of Figure 17 represents the ACST8 application, and is used to stress the
ACST switch according to the IEC 61000-4-5 standard conditions. With the additional effect
of the load which is limiting the current, the ACST switch withstands the voltage spikes up to
2 kV on top of the peak line voltage. The protection is based on an overvoltage crowbar
technology. The ACST8 folds back safely to the on state as shown in Figure 18. The ACST8
recovers its blocking voltage capability after the surge and the next zero current crossing.
Such a non repetitive test can be done at least 10 times on each AC line voltage polarity.
Figure 17. Overvoltage ruggedness test circuit for resistive and inductive loads for
IEC 61000-4-5 standards
AC Mains
R
Filtering unit
Rg
Model of the load
Rgene
Surge generator
ACST8
2kV surge
L
R = 13 , L = 2 µH, Vsurge = 2 kV
Rg = 82
Ω
Ω
Fl T AC sw ch Repetitive peak elf-state voltage Package Delivery mode
Ordering information scheme ACST8
8/17 DocID7463 Rev 10
Figure 18. Typical current and voltage waveforms across the ACST8 during
IEC 61000-4-5 standard test
3 Ordering information scheme
Figure 19. Ordering information scheme
I
V
0
0
Vpeak =V
CL
1.2/50 µs voltage surge
8/20 µs current surge
Ipeak = 160 A
dI/dt = 180 A/µs
ACS T 8 30 - 8 G TR
AC switch
Topology
On-state rms current
Repetitive peak off-state voltage
Package
Delivery mode
T = Triac
8 = 8 A
8 = 800 V
FP = TO-220FPAB
T = TO-220AB
G = D2PA K
TR = Tape and reel
Blank = Tube
Triggering gate current
30 = 30 mA
t: www.3t.ccm
DocID7463 Rev 10 9/17
ACST8 Package information
17
4 Package information
Epoxy meets UL94, V0
Recommended torque: 0.4 to 0.6 N·m
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK
®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
is an ST trademark.
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Package information ACST8
10/17 DocID7463 Rev 10
4.1 TO-220AB package information
Figure 20. TO-220AB package outline
(1)
Resin gate accepted in one of the two positions
or in the symmetrical opposites
Resin gate 0.5 mm max.
protrusion
(1)
DocID7463 Rev 10 11/17
ACST8 Package information
17
Table 6. TO-220AB package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.4 4.6 0.1732 0.1811
b 0.61 0.88 0.024 0.0346
b1 1.14 1.55 0.0449 0.0610
c 0.48 0.7 0.0189 0.0276
D 15.25 15.75 0.6004 0.6201
D1 1.27 typ. 0.0500 typ.
E 10 10.4 0.3937 0.4094
e 2.4 2.7 0.0945 0.1063
e1 4.95 5.15 0.1949 0.2028
F 1.23 1.32 0.0484 0.052
H1 6.2 6.6 0.2441 0.2598
J1 2.4 2.72 0.0945 0.1071
L 13 14 0.5118 0.5512
L1 3.5 3.93 0.1378 0.1547
L20 16.40 typ. 0.6457 typ.
L30 28.90 typ. 1.1378 typ.
θP 3.75 3.85 0.1476 0.1516
Q 2.65 2.95 0.1043 0.1161
Package information ACST8
12/17 DocID7463 Rev 10
4.2 TO-220FPAB package information
Figure 21. TO-220FPAB package outline
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DocID7463 Rev 10 13/17
ACST8 Package information
17
Table 7. TO-220FPAB package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.1739 0.1818
B 2.50 2.70 0.0988 0.1067
D 2.50 2.750 0.0988 0.1087
E 0.45 0.70 0.0178 0.0277
F 0.75 1.0 0.0296 0.0395
F1 1.15 1.70 0.0455 0.0672
F2 1.15 1.70 0.0455 0.0672
G 4.95 5.20 0.1957 0.2055
G1 2.40 2.70 0.0949 0.1067
H 10.0 10.4 0.3953 0.4111
L2 16 Typ. 0.6324 Typ.
L3 28.6 30.6 1.1304 1.2095
L4 9.8 10.6 0.3874 0.4190
L5 2.9 3.6 0.1146 0.1423
L6 15.9 16.4 0.6285 0.6482
L7 9.00 9.30 0.3557 0.3676
Diam. 3.00 3.20 0.1186 0.1265
L7 THERMAL PAD A1 GAUGE PLANE
Package information ACST8
14/17 DocID7463 Rev 10
4.3 D
2
PAK package information
Figure 22. D
2
PAK package outline
DocID7463 Rev 10 15/17
ACST8 Package information
17
Figure 23. Footprint (dimensions in mm)
Table 8. D
2
PAK package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.1739 0.1818
A1 2.49 2.69 0.0984 0.1063
A2 0.03 0.23 0.0012 0.0091
B 0.70 0.93 0.0277 0.0368
B2 1.14 1.70 0.0451 0.0672
C 0.45 0.60 0.0178 0.0237
C2 1.23 1.36 0.0486 0.0538
D 8.95 9.35 0.3538 0.3696
E 10.00 10.40 0.3953 0.4111
G 4.88 5.28 0.1929 0.2087
L 15.00 15.85 0.5929 0.6265
L2 1.27 1.40 0.0502 0.0553
L3 1.40 1.75 0.0553 0.0692
M 2.40 3.20 0.0949 0.1265
R 0.40 typ. 0.0158 typ.
V2 0°
16.90
10.30
8.90 3.70
5.08
1.30
Ordering information ACST8
16/17 DocID7463 Rev 10
5 Ordering information
6 Revision history
Table 9. Ordering information
Order code Marking Package Weight Base qty Packing mode
ACST830-8FP
ACST8308
TO-220FPAB 2.4 g 50 Tube
ACST830-8T TO-220AB 2.3 g 50 Tube
ACST830-8GTR D
2
PAK 1.5 g 500 Tape and reel
Table 10. Document revision history
Date Revision Changes
Jan-2002 4B Last update.
08-Nov-2004 5 TO-220AB and D
2
PAK packages added.
24-Nov-2004 6 Table 6 page 3: I
GT
parameter added
18-Dec-2009 7 Added ECOPACK statement. Reformatted for consistency with
other datasheets in this product class. Order codes updated.
01-Jul-2010 8 Updated Figure 19.
07-Feb-2011 9 Updated Table 2.
04-Sep-2017 10
Updated features in cover page and Table 2.
Updated Section 4: Package information.
Minor text changes.
DocID7463 Rev 10 17/17
ACST8
17
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